JPH11266550A - Uninterruptible power unit - Google Patents
Uninterruptible power unitInfo
- Publication number
- JPH11266550A JPH11266550A JP10065128A JP6512898A JPH11266550A JP H11266550 A JPH11266550 A JP H11266550A JP 10065128 A JP10065128 A JP 10065128A JP 6512898 A JP6512898 A JP 6512898A JP H11266550 A JPH11266550 A JP H11266550A
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- emergency
- charging voltage
- power
- charger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Stand-By Power Supply Arrangements (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、無停電電源装置に
関する。[0001] The present invention relates to an uninterruptible power supply.
【０００２】[0002]
【従来の技術】従来の無停電電源装置は、例えば、図５
に示すように、商用電源等の常用交流電源２０が通電時
に充電器２２で予め蓄電池２３を充電しておき、前記常
用交流電源２０が停電すると、その直後から前記蓄電池
２２の直流電力をインバータ２４で交流に変換して負荷
に電力供給するとともに、自家用発電機等の非常用交流
電源２１を作動させ、この非常用交流電源２１が定常状
態に安定化するまでの所定の安定化期間経過後に、所定
のスイッチ２５を前記常用交流電源２０から前記非常用
交流電源２１へ切り換えて、前記非常用交流電源２１が
コンバータ２６を介して前記インバータ２４に接続する
回路を形成し、前記非常用交流電源２１の直流電力を前
記インバータ２４で交流に変換して前記負荷に電力供給
する構成のものがあった。更に、前記スイッチ２５が切
り換わって前記非常用交流電源２１が無負荷状態から瞬
時に負荷状態になるため、その負荷を軽減して発電機の
ノッキング等を防止するために、前記スイッチ２５の切
り換わり後に所定の並行運転期間を設け、前記蓄電池２
３の直流電力と前記コンバータ２６で直流に変換された
前記非常用交流電源２１の直流電力が前記インバータ２
４で交流変換され、並行して前記負荷に電力供給し、前
記並行運転期間経過後に前記蓄電池２３から前記インバ
ータ２４への回路が遮断され、前記非常用交流電源２１
から安定して電力供給される構成のものがあった。かか
る構成の従来の無停電電源装置として、例えば、特公昭
６２−１００９４号公報に開示されているものがある。2. Description of the Related Art A conventional uninterruptible power supply is, for example, shown in FIG.
As shown in FIG. 3, when a commercial AC power supply 20 such as a commercial power supply is energized, a battery 22 is charged in advance by a charger 22 and when the commercial AC power supply 20 is cut off, the DC power of the storage battery 22 is immediately transferred to an inverter 24. After converting to AC and supplying power to the load, the emergency AC power supply 21 such as a private generator is operated, and after a predetermined stabilization period until the emergency AC power supply 21 is stabilized to a steady state, A predetermined switch 25 is switched from the normal AC power supply 20 to the emergency AC power supply 21 to form a circuit that connects the emergency AC power supply 21 to the inverter 24 via a converter 26, and the emergency AC power supply 21 There is a configuration in which the DC power is converted into AC by the inverter 24 and the power is supplied to the load. Further, since the switch 25 is switched and the emergency AC power supply 21 is instantaneously loaded from the no-load state, the switch 25 is switched off in order to reduce the load and prevent knocking of the generator. After the replacement, a predetermined parallel operation period is provided, and the storage battery 2
3 and the DC power of the emergency AC power supply 21 converted to DC by the
4, the power is supplied to the load in parallel, and after the parallel operation period, the circuit from the storage battery 23 to the inverter 24 is cut off.
There is a configuration in which power is supplied stably from the A conventional uninterruptible power supply having such a configuration is disclosed, for example, in Japanese Patent Publication No. 62-10094.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記し
た従来の無停電電源装置では、前記常用交流電源２０の
停電直後に前記非常用交流電源２１の作動を開始すると
ともに、発電機のノッキングや突出電流の発生を防止す
るために、所定の安定化期間を待って前記常用交流電源
２０から前記非常用交流電源２１へ電源を切り換えるス
イッチ２５が少なくとも必要である。更に、前記並行運
転期間を設ける場合は、前記並行運転期間から前記非常
用交流電源２１の定常動作へとスムーズに移行するため
に、前記非常用交流電源２１の電圧値を前記蓄電池２３
の出力電圧に対して徐々に増加させる制御が必要とな
る。このように、従来の無停電電源装置では、前記非常
用交流電源２１への切り換えタイミングや電圧値の制御
が複雑であり、適正動作を得るための調整が困難であっ
た。However, in the above-described conventional uninterruptible power supply, the operation of the emergency AC power supply 21 is started immediately after the power failure of the commercial AC power supply 20, and at the same time, the knocking of the generator and the projecting current are prevented. In order to prevent the occurrence of the above, at least a switch 25 for switching the power supply from the commercial AC power supply 20 to the emergency AC power supply 21 after waiting for a predetermined stabilization period is required. Further, when the parallel operation period is provided, the voltage value of the emergency AC power supply 21 is changed to the storage battery 23 in order to smoothly shift from the parallel operation period to the normal operation of the emergency AC power supply 21.
Needs to be controlled to gradually increase the output voltage. As described above, in the conventional uninterruptible power supply, the switching timing to the emergency AC power supply 21 and the control of the voltage value are complicated, and it is difficult to perform adjustment for obtaining proper operation.
【０００４】本発明の目的は、上述の問題点を解消し、
常用交流電源及び非常用交流電源の特性にかかわらず、
両電源間の切り換えに伴う複雑な調整が不要で、両電源
間のスムーズな切り換えが可能な無停電電源装置を提供
する点にある。An object of the present invention is to solve the above-mentioned problems,
Regardless of the characteristics of the commercial AC power supply and the emergency AC power supply,
It is an object of the present invention to provide an uninterruptible power supply that does not require complicated adjustment for switching between the two power supplies and can smoothly switch between the two power supplies.
【０００５】[0005]
【課題を解決するための手段】この目的を達成するため
の本発明による無停電電源装置の第一の特徴構成は、特
許請求の範囲の欄の請求項１に記載した通り、蓄電装置
と、常用交流電源からの交流入力を直流出力に変換して
前記蓄電装置を所定の第１充電電圧に第１ダイオードを
介して充電可能な第１充電器と、非常用交流電源からの
交流入力を直流出力に変換して前記蓄電装置を前記第１
充電電圧より低い所定の第２充電電圧に第２ダイオード
を介して充電可能な第２充電器と、前記蓄電装置からの
直流入力を交流出力に変換するインバータと、前記蓄電
装置の充電電圧値が所定の閾値以下に低下した場合に前
記非常用交流電源の作動を開始する非常用交流電源制御
部とを備えてなる点にある。ここで、前記蓄電装置は蓄
電池やコンデンサ等の蓄電機能を有する装置を意味す
る。A first characteristic configuration of the uninterruptible power supply according to the present invention for achieving this object is as described in claim 1 of the claims. A first charger that converts an AC input from a commercial AC power supply to a DC output and charges the power storage device to a predetermined first charging voltage via a first diode; Output to the first power storage device.
A second charger that can be charged to a predetermined second charging voltage lower than the charging voltage via a second diode, an inverter that converts a DC input from the power storage device to an AC output, and a charging voltage value of the power storage device is An emergency AC power supply control unit that starts the operation of the emergency AC power supply when the emergency AC power supply falls below a predetermined threshold value. Here, the power storage device means a device having a power storage function such as a storage battery or a capacitor.
【０００６】同第二の特徴構成は、特許請求の範囲の欄
の請求項２に記載した通り、上述の第一の特徴構成に加
えて、前記蓄電装置の充電電圧値が前記閾値以上に復帰
した場合に、前記非常用交流電源制御部が前記非常用交
流電源の作動を停止する点にある。According to a second feature configuration, as described in claim 2 of the claims, in addition to the first feature configuration, the charging voltage value of the power storage device is restored to a value equal to or higher than the threshold value. In this case, the emergency AC power supply control unit stops the operation of the emergency AC power supply.
【０００７】同第三の特徴構成は、特許請求の範囲の欄
の請求項３に記載した通り、上述の第一の特徴構成に加
えて、前記蓄電装置の充電電圧値が前記第１充電電圧に
復帰した場合に、前記非常用交流電源制御部が前記非常
用交流電源の作動を停止する点にある。[0007] The third characteristic configuration is, as described in claim 3 of the claims, in addition to the above-mentioned first characteristic configuration, wherein the charging voltage value of the power storage device is the first charging voltage. In this case, the emergency AC power supply control unit stops the operation of the emergency AC power supply.
【０００８】同第四の特徴構成は、特許請求の範囲の欄
の請求項４に記載した通り、蓄電装置と、常用交流電源
からの交流入力を直流出力に変換して前記蓄電装置を所
定の第１充電電圧に第１ダイオードを介して充電可能な
第１充電器と、非常用交流電源からの交流入力を直流出
力に変換して前記蓄電装置を前記第１充電電圧より低い
所定の第２充電電圧に第２ダイオードを介して充電可能
な第２充電器と、前記蓄電装置からの直流入力を交流出
力に変換するインバータとを備えてなり、前記非常用交
流電源が商用電源であり、前記第２充電器が常時給電状
態にある点にある。The fourth characteristic configuration is that, as described in claim 4 of the claims, the power storage device and an AC input from a commercial AC power supply are converted into a DC output to convert the power storage device to a predetermined power. A first charger that can be charged to a first charging voltage via a first diode, and a predetermined second voltage that is lower than the first charging voltage by converting an AC input from an emergency AC power supply into a DC output. A second charger capable of charging a charging voltage via a second diode, and an inverter for converting a DC input from the power storage device to an AC output, wherein the emergency AC power supply is a commercial power supply, The point is that the second charger is always in the power supply state.
【０００９】以下に、作用並びに効果について説明す
る。本発明による無停電電源装置の第一の特徴構成によ
れば、前記常用交流電源が通電中に前記蓄電装置が前記
第１充電電圧まで充電された状態で、前記常用交流電源
から前記第１充電器、前記第１ダイオード及び前記イン
バータを介して負荷側に電力が供給される。この状態で
前記常用交流電源が停電すると、前記第１充電器からの
電力供給が停止し、代わって前記蓄電装置から前記イン
バータを介して負荷側に電力が供給される。従って、前
記蓄電装置の充電電圧値は電力供給とともに低下し、前
記閾値電圧以下になると前記非常用交流電源制御部によ
って前記非常用交流電源の作動が開始する。前記非常用
交流電源が定常状態にまで立ち上がると前記第２充電器
の出力には前記第２充電電圧に前記第２ダイオードの電
圧降下分を加えた出力電圧が現れるが、前記充電電圧値
が前記第２充電電圧より高い間は、前記第２ダイオード
はオフしている。更に、前記充電電圧値が前記第２充電
電圧まで低下すると、前記第２ダイオードがオンし、前
記第２充電器から前記インバータを介して負荷側に電力
供給される。従って、前記第２充電電圧を前記第１充電
電圧より低く、前記閾値電圧を前記第１充電電圧と前記
第２充電電圧の間の所定の適切な値に設定しておくだけ
で、前記非常用交流電源が定常状態にまで安定化するの
を待って前記常用交流電源から切り換えるためのスイッ
チを設けず、更に、前記非常用交流電源の電圧値の制御
も行わずに、無停電で前記常用交流電源から前記非常用
交流電源への電源の切り換えを行うことができるのであ
る。前記非常用交流電源の立ち上がり時において、この
ようなスイッチによる電源の切り換えを回避できるた
め、急激な負荷条件の変化が防止でき、前記非常用交流
電源が発電機の場合にノッキングを防止できるのであ
る。The operation and effect will be described below. According to the first characteristic configuration of the uninterruptible power supply according to the present invention, in a state where the power storage device is charged to the first charging voltage while the commercial AC power is energized, the first charging is performed from the commercial AC power. Power is supplied to the load side via the switch, the first diode, and the inverter. When the commercial AC power supply stops in this state, power supply from the first charger is stopped, and power is supplied from the power storage device to the load side via the inverter instead. Therefore, the charging voltage value of the power storage device decreases with power supply, and when the charging voltage value becomes equal to or lower than the threshold voltage, the operation of the emergency AC power supply is started by the emergency AC power supply control unit. When the emergency AC power supply rises to a steady state, an output voltage obtained by adding the voltage drop of the second diode to the second charging voltage appears at the output of the second charger. While higher than the second charging voltage, the second diode is off. Further, when the charging voltage value decreases to the second charging voltage, the second diode is turned on, and power is supplied from the second charger to the load side via the inverter. Therefore, the emergency charging is performed only by setting the second charging voltage lower than the first charging voltage and setting the threshold voltage to a predetermined appropriate value between the first charging voltage and the second charging voltage. There is no switch for switching from the regular AC power supply after the AC power supply is stabilized to a steady state, and further, without controlling the voltage value of the emergency AC power supply, the uninterruptible power supply and the AC The power supply can be switched from the power supply to the emergency AC power supply. When the emergency AC power supply rises, switching of the power supply by such a switch can be avoided, so that a sudden change in load condition can be prevented, and knocking can be prevented when the emergency AC power supply is a generator. .
【００１０】引き続き、停電した前記常用交流電源が復
帰すると、前記第１充電器が作動状態になり、前記第１
充電器の出力に前記第１充電電圧に前記第１ダイオード
の電圧降下分を加えた出力電圧が現れる。この時、前記
充電電圧値は前記第２充電電圧まで低下しているため、
前記第１ダイオードはオンし、前記蓄電装置の充電及び
前記インバータを介して負荷側への電力供給を開始す
る。しかし、前記第１充電器の出力は前記常用交流電源
の立ち上がりに伴い、徐々に電圧が上昇するため前記第
１ダイオードがオンした後の電流も徐々に増加すること
になり急激な負荷変動が生じず、前記常用交流電源の停
電時と同様に復帰時においてもノッキングを効果的に防
止できるのである。Subsequently, when the normal AC power supply after the power failure is restored, the first charger is activated and the first charger is activated.
An output voltage obtained by adding the voltage drop of the first diode to the first charging voltage appears at the output of the charger. At this time, since the charging voltage value has decreased to the second charging voltage,
The first diode is turned on, and starts charging the power storage device and supplying power to the load via the inverter. However, the output of the first charger gradually rises in voltage with the rise of the commercial AC power supply, so that the current after the first diode is turned on also gradually increases, causing a sudden load change. Instead, knocking can be effectively prevented at the time of recovery as well as at the time of power failure of the common AC power supply.
【００１１】更に、前記閾値電圧と前記第２充電電圧の
関係を、前記常用交流電源の停電時において前記非常用
交流電源の定常状態になるまでの立ち上がり時間が前記
充電電圧値が前記閾値から前記第２充電電圧まで低下す
る時間より短くなるように、前記非常用交流電源及び前
記蓄電装置の能力や負荷条件等に基づいて設定すること
により、前記非常用交流電源のノッキングや突出電流を
より効果的に防止できるのである。Further, the relationship between the threshold voltage and the second charging voltage is determined by determining a rising time required for the emergency AC power supply to reach a steady state at the time of a power failure of the commercial AC power supply. By setting the emergency AC power supply and the power storage device based on the capacity and load condition of the emergency AC power supply so as to be shorter than the time required to decrease to the second charging voltage, knocking and projecting current of the emergency AC power supply can be more effectively reduced. Can be prevented.
【００１２】また、前記閾値電圧と前記第１充電電圧と
の間に一定の電圧差を設けることで、前記蓄電装置が前
記閾値電圧まで放電するまでの期間に前記常用交流電源
が復帰した場合は、前記非常用交流電源に対しては何の
影響も及ぼさずに通常状態に復帰できるため、前記非常
用交流電源に対する不必要な運転の開始及び停止を行わ
ずに済むのである。[0012] Further, by providing a constant voltage difference between the threshold voltage and the first charging voltage, the normal AC power supply can be restored in a period until the power storage device discharges to the threshold voltage. Since the emergency AC power supply can be returned to the normal state without any influence, unnecessary start and stop of the emergency AC power supply can be avoided.
【００１３】この結果、本特徴構成によれば、前記常用
交流電源及び前記非常用交流電源は、両電源間で位相を
同期させる必要が無く、更には、線数、相数、電圧、周
波数等の出力形式を夫々独立且つ任意に選択できるた
め、例えば、前記常用交流電源として商用交流電源をし
た場合に、前記非常用交流電源として種々の出力形式の
発電機を利用できるのである。更に、前記常用交流電源
または前記非常用交流電源、或いはその両方を含めた無
停電電源システム全体の設計自由度が広がり、システム
全体の小型化を図ることができるのである。As a result, according to this characteristic configuration, it is not necessary for the common AC power supply and the emergency AC power supply to synchronize phases between the two power supplies, and furthermore, the number of lines, the number of phases, the voltage, the frequency Can be selected independently and arbitrarily. For example, when a commercial AC power supply is used as the regular AC power supply, various output types of generators can be used as the emergency AC power supply. Further, the degree of freedom in designing the entire uninterruptible power supply system including the commercial AC power supply and / or the emergency AC power supply, or both, is expanded, and the size of the entire system can be reduced.
【００１４】同第二の特徴構成によれば、停電した前記
常用交流電源が復帰すると、前記第１充電器の出力が前
記第１充電電圧に前記第１ダイオードの電圧降下分を加
えた出力電圧まで上昇し、前記充電電圧値が前記第２充
電電圧から前記第１充電電圧まで徐々に上昇するが、前
記充電電圧値が前記閾値に達するまでは前記非常用交流
電源は作動状態にあるため、万が一負荷状態が急激に変
化して前記充電電圧値が前記第２充電電圧まで降下して
も、前記非常用交流電源から電力供給できるため安定動
作が確保できるのである。また、前記充電電圧値が前記
閾値を超えて充電されれば、その後に再び前記常用交流
電源が停電しても、前記非常用交流電源の立ち上がり時
の過渡状態が通常の停電時と同様になるため、前記充電
電圧値に依存して前記閾値電圧を変更する等の特別な調
整等が不要となるのである。[0014] According to the second characteristic configuration, when the power supply is restored, the output of the first charger becomes an output voltage obtained by adding a voltage drop of the first diode to the first charging voltage. And the charging voltage value gradually increases from the second charging voltage to the first charging voltage.However, since the emergency AC power supply is in an operating state until the charging voltage value reaches the threshold value, Even if the load state suddenly changes and the charging voltage value drops to the second charging voltage, stable operation can be ensured because power can be supplied from the emergency AC power supply. Further, if the charging voltage value is charged exceeding the threshold value, the transient state at the time of startup of the emergency AC power supply becomes the same as that at the time of normal power failure even if the service AC power supply subsequently fails again. This eliminates the need for special adjustment such as changing the threshold voltage depending on the charging voltage value.
【００１５】同第三の特徴構成によれば、第二の特徴構
成の作用効果に加えて、前記非常用交流電源のオンとオ
フの間にヒステリシスを持たせる結果となるため、前記
充電電圧値が前記閾値電圧と前記第１充電電圧との間に
ある場合に、前記常用交流電源が瞬時停電しても、前記
非常用交流電源が不必要に作動を開始したり停止したり
することを防止でき、当該不必要な動作に伴う、ノッキ
ング等を回避でき安定動作が可能となるのである。According to the third aspect, in addition to the operation and effect of the second aspect, a hysteresis is provided between the on and off of the emergency AC power supply. Prevents the emergency AC power supply from unnecessarily starting or stopping even when the commercial AC power supply momentarily fails when the voltage is between the threshold voltage and the first charging voltage. As a result, knocking and the like accompanying the unnecessary operation can be avoided and stable operation can be performed.
【００１６】同第四の特徴構成によれば、前記常用交流
電源が通電中に前記蓄電装置が前記第１充電電圧まで充
電された状態で、前記常用交流電源から前記第１充電
器、前記第１ダイオード及び前記インバータを介して負
荷側に電力が供給される。また、前記非常用交流電源で
ある商用電源も通電中であるが、前記第２充電器の出力
には前記第２充電電圧に前記第２ダイオードの電圧降下
分を加えた出力電圧が現れるものの、前記充電電圧値が
前記第２充電電圧より高い前記第１充電電圧であるため
前記第２ダイオードはオフしており、前記非常用交流電
源から負荷側への電力供給は行われない。この状態で前
記常用交流電源が停電すると、前記第１充電器からの電
力供給が停止し、代わって前記蓄電装置から前記インバ
ータを介して負荷側に電力が供給される。前記蓄電装置
の充電電圧値はこの電力供給とともに低下するが、前記
充電電圧値が前記第２充電電圧より高い間は、前記第２
ダイオードはオフしており、前記蓄電装置からのみの電
力供給となる。更に、前記充電電圧値が前記第２充電電
圧まで低下すると、前記第２ダイオードがオンし、前記
第２充電器から前記インバータを介して負荷側に電力供
給される。According to the fourth characteristic configuration, in a state where the power storage device is charged to the first charging voltage while the commercial AC power supply is energized, the commercial AC power supply supplies the first charger, Power is supplied to the load side via one diode and the inverter. Although the commercial power supply as the emergency AC power supply is also energized, the output of the second charger shows an output voltage obtained by adding the voltage drop of the second diode to the second charging voltage. Since the charging voltage value is the first charging voltage higher than the second charging voltage, the second diode is off, and power is not supplied from the emergency AC power supply to the load. When the commercial AC power supply stops in this state, power supply from the first charger is stopped, and power is supplied from the power storage device to the load side via the inverter instead. Although the charging voltage value of the power storage device decreases with the supply of power, while the charging voltage value is higher than the second charging voltage, the second
The diode is off, and power is supplied only from the power storage device. Further, when the charging voltage value decreases to the second charging voltage, the second diode is turned on, and power is supplied from the second charger to the load side via the inverter.
【００１７】引き続き、停電した前記常用交流電源が復
帰すると、前記第１充電器が作動状態になり、前記第１
充電器の出力に前記第１充電電圧に前記第１ダイオード
の電圧降下分を加えた出力電圧が現れる。この時、前記
充電電圧値は前記第２充電電圧まで低下しているため、
前記第１ダイオードはオンし、前記蓄電装置の充電及び
前記インバータを介して負荷側への電力供給を開始す
る。しかし、前記第１充電器の出力は前記常用交流電源
の立ち上がりに伴い、徐々に電圧が上昇するため前記第
１ダイオードがオンした後の電流も徐々に増加すること
になり急激な負荷変動が生じず、前記常用交流電源の停
電時と同様に復帰時においてもノッキングを効果的に防
止できるのである。Subsequently, when the normal AC power supply that has lost power is restored, the first charger is activated, and the first charger is activated.
An output voltage obtained by adding the voltage drop of the first diode to the first charging voltage appears at the output of the charger. At this time, since the charging voltage value has decreased to the second charging voltage,
The first diode is turned on, and starts charging the power storage device and supplying power to the load via the inverter. However, the output of the first charger gradually rises in voltage with the rise of the commercial AC power supply, so that the current after the first diode is turned on also gradually increases, causing a sudden load change. Instead, knocking can be effectively prevented at the time of recovery as well as at the time of power failure of the common AC power supply.
【００１８】従って、前記第２充電電圧を前記第１充電
電圧より低く設定しておくだけで、前記非常用交流電源
が定常状態にまで安定化するのを待って前記常用交流電
源から切り換えるためのスイッチを設けず、また、前記
非常用交流電源の電圧値の制御も行わずに、更には、前
記第一の特徴構成のように前記非常用交流電源制御部に
よる前記非常用交流電源の作動開始及び停止をも伴わず
に、簡単な回路構成で、無停電で前記常用交流電源から
前記非常用交流電源への電源の切り換えを行うことがで
きる無停電電源装置を提供できるのである。Therefore, only by setting the second charging voltage lower than the first charging voltage, it is possible to wait for the emergency AC power supply to stabilize to a steady state and switch from the normal AC power supply. No switch is provided, and the voltage value of the emergency AC power supply is not controlled, and further, the operation of the emergency AC power supply by the emergency AC power supply control unit is started as in the first characteristic configuration. Further, it is possible to provide an uninterruptible power supply device capable of switching the power supply from the normal AC power supply to the emergency AC power supply with a simple circuit configuration without interruption without interruption.
【００１９】この結果、本特徴構成によれば、前記常用
交流電源及び前記非常用交流電源は、両電源間で位相を
同期させる必要が無く、更には、線数、相数、電圧、周
波数等の出力形式を夫々独立且つ任意に選択できるた
め、例えば、前記常用交流電源として種々の出力形式の
発電機を利用できるのである。更に、前記常用交流電源
を含めた無停電電源システム全体の設計自由度が広が
り、システム全体の小型化を図ることができるのであ
る。As a result, according to this characteristic configuration, it is not necessary for the commercial AC power supply and the emergency AC power supply to synchronize the phases between the two power supplies, and further, the number of lines, the number of phases, the voltage, the frequency Can be selected independently and arbitrarily, for example, generators of various output types can be used as the ordinary AC power supply. Further, the degree of freedom in designing the entire uninterruptible power supply system including the ordinary AC power supply is expanded, and the size of the entire system can be reduced.
【００２０】[0020]
【発明の実施の形態】以下に、本発明に係る無停電電源
装置の実施の形態を図面に基づいて説明する。図１に示
すように、本発明に係る無停電電源装置の第一の実施形
態（以下、本発明装置１という。）は、蓄電装置である
蓄電池２と、常用交流電源１０からの交流入力を直流出
力に変換して前記蓄電池２を所定の第１充電電圧Ｖ1 に
第１ダイオード３を介して充電可能な第１充電器４と、
非常用交流電源１１からの交流入力を直流出力に変換し
て前記蓄電池２を前記第１充電電圧Ｖ1 より低い所定の
第２充電電圧Ｖ2 に第２ダイオード５を介して充電可能
な第２充電器６と、前記蓄電池２からの直流入力を交流
出力に変換するインバータ７と、前記蓄電池２の充電電
圧値ＶC が所定の閾値ＶT 以下に低下した場合に前記非
常用交流電源１１の作動を開始する非常用交流電源制御
部８とから構成されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an uninterruptible power supply according to the present invention will be described below with reference to the drawings. As shown in FIG. 1, a first embodiment of an uninterruptible power supply according to the present invention (hereinafter, referred to as the present invention 1) is configured such that a storage battery 2 as a power storage device and an AC input from a commercial AC power supply 10 are input. A first charger 4 capable of converting the storage battery 2 into a DC output and charging the storage battery 2 to a predetermined first charging voltage V 1 via the first diode 3;
The AC input from the emergency AC power supply 11 into a DC output storage battery 2 can be charged through the second diode 5 to the second charging voltage V 2 lower predetermined than the first charging voltages V 1 of the second a charger 6, an inverter 7 for converting the DC input from the storage battery 2 into AC output, the charging voltage value V C of the battery 2 of the emergency AC power supply 11 when drops below a predetermined threshold value V T And an emergency AC power control unit 8 which starts operation.
【００２１】尚、本発明装置１では、前記常用交流電源
１０として商用電源を、前記非常用交流電源１１として
ディーゼルエンジンやガスタービン等の原動機による自
家発電機を使用することを想定している。図中破線部分
が本発明装置１であるが、前記非常用交流電源１１を本
発明装置１に含む構成としても構わない。In the apparatus 1 of the present invention, it is assumed that a commercial power supply is used as the normal AC power supply 10 and a private generator using a prime mover such as a diesel engine or a gas turbine is used as the emergency AC power supply 11. Although the broken line in the figure is the device 1 of the present invention, the emergency AC power supply 11 may be configured to be included in the device 1 of the present invention.
【００２２】前記第１充電器４及び前記第２充電器６は
所定の入力条件の交流入力を直流に変換して定電圧で出
力するコンバータである。また、前記インバータ７は定
電圧定周波数インバータ（ＣＶＣＦ）を使用し、前記充
電電圧値ＶC が変動しても一定の出力電圧と一定の出力
周波数を維持できる構成となっている。The first charger 4 and the second charger 6 are converters for converting an AC input under a predetermined input condition into a DC and outputting a constant voltage. Moreover, the inverter 7 using a constant-voltage constant-frequency inverter (CVCF), the charging voltage V C is a configuration capable of maintaining a constant output frequency and the constant output voltage vary.
【００２３】次に、本発明装置１の動作について説明す
る。図２に示すように、前記常用交流電源１０が通電中
（ｔ＜ｔ1 ）は前記蓄電池２は前記第１充電器４から前
記第１ダイオード３を介して前記第１充電電圧Ｖ1まで
充電されている。負荷側への電力供給は、前記常用交流
電源１０から前記第１充電器４、前記第１ダイオード３
及び前記インバータ７を介して行われている。前記非常
用交流電源１１は運転を停止しているので、前記第２充
電器６も当然に作動を停止している。Next, the operation of the device 1 of the present invention will be described. As shown in FIG. 2, while the commercial AC power supply 10 is energized (t <t 1 ), the storage battery 2 is charged from the first charger 4 to the first charging voltage V 1 via the first diode 3. Have been. The power supply to the load side is performed by the first AC charger 10 and the first diode 3 from the commercial AC power supply 10.
And through the inverter 7. Since the operation of the emergency AC power supply 11 is stopped, the operation of the second charger 6 is also stopped naturally.
【００２４】時刻ｔ1 で前記常用交流電源１０が停電す
ると、前記第１充電器４からの電力供給が停止し、代わ
って前記蓄電池２から前記インバータ７を介して負荷側
に電力供給される。かかる電力供給とともに前記蓄電池
２の放電が進み、前記蓄電池２の前記充電電圧値ＶC は
低下する。時刻ｔ2 で前記充電電圧値ＶC が前記閾値電
圧ＶT 以下まで低下すると、前記非常用交流電源制御部
８がそれを検知して、前記非常用交流電源１１の作動が
開始する。前記充電電圧値ＶC は更に低下を続け、時刻
ｔ3 において前記第２充電電圧Ｖ2 まで低下する。ここ
で、前記非常用交流電源１１の立ち上がり時においてノ
ッキングや突出電流を効果的に防止するために、前記閾
値電圧ＶT と前記第２充電電圧Ｖ2 の関係を、前記非常
用交流電源１１及び前記蓄電池２の能力や負荷条件等に
基づいて予め適正に設定しているので、前記非常用交流
電源１１は、時刻ｔ2 から時刻ｔ3 までの間に十分に定
常状態に達する。時刻ｔ2 から時刻ｔ3 までの間に前記
非常用交流電源１１が立ち上がり、前記第２充電器６の
出力には前記第２充電電圧Ｖ2 に前記第２ダイオード５
の電圧降下分を加えた出力電圧が現れるが、前記充電電
圧値ＶC が前記第２充電電圧Ｖ2 より高い間（ｔ2 ＜ｔ
＜ｔ3 ）は、前記第２ダイオード５はオフしている。When the commercial AC power supply 10 fails at time t 1 , the power supply from the first charger 4 is stopped, and instead the power is supplied from the storage battery 2 to the load side via the inverter 7. The discharge of the storage battery 2 proceeds along with the power supply, and the charging voltage value V C of the storage battery 2 decreases. When the charging voltage value V C decreases to the threshold voltage V T or less at time t 2 , the emergency AC power supply control unit 8 detects this, and the operation of the emergency AC power supply 11 starts. The charging voltage value V C continues to decrease, and decreases to the second charging voltage V 2 at time t 3 . Here, in order to effectively prevent knocking and projecting current at the time of rising of the emergency AC power supply 11, the threshold voltage V T and the second charging voltage V 2 relationship, the AC power source 11 and the emergency since the preset appropriately based on the battery 2 capacity and load conditions, the emergency AC power supply 11 reaches a sufficiently steady state during the period from the time t 2 to time t 3. The emergency AC power supply 11 rises from time t 2 to time t 3 , and the output of the second charger 6 includes the second charging voltage V 2 and the second diode 5.
Of the output voltage appears plus the voltage drop, between the charging voltage V C is higher than the second charging voltage V 2 (t 2 <t
<T 3 ), the second diode 5 is off.
【００２５】また、前記閾値電圧ＶT と前記第１充電電
圧Ｖ1 との間に一定の電圧差を設けることで、前記蓄電
池２が前記閾値電圧ＶT まで放電するまでの期間に前記
常用交流電源１０が復帰した場合、例えば、前記商用電
源の瞬時停電時は、前記非常用交流電源１１に対しては
何の影響も及ぼさずに通常状態に復帰できるため、前記
非常用交流電源１１に対する不必要な運転の開始及び停
止を行わずに済むのである。Further, by providing a constant voltage difference between the threshold voltage V T and the first charging voltage V 1 , the common AC is maintained until the storage battery 2 discharges to the threshold voltage V T. When the power supply 10 returns, for example, at the moment of a momentary power failure of the commercial power supply, the emergency AC power supply 11 can be returned to the normal state without any influence. It is not necessary to start and stop the necessary operation.
【００２６】時刻ｔ3 で前記充電電圧値ＶC が前記第２
充電電圧Ｖ2 まで低下すると、前記第２ダイオード５が
オンし、前記第２充電器６から前記インバータ７を介し
て負荷側に電力供給され、前記常用交流電源１０が復帰
するまで（ｔ＝ｔ4 ）、当該状態が継続する。このよう
に、前記第２充電電圧Ｖ2 を前記第１充電電圧Ｖ1 より
低く、前記閾値電圧ＶT を前記第１充電電圧Ｖ1 と前記
第２充電電圧Ｖ2 の間の所定の適切な値に設定しておく
だけで、無停電で前記常用交流電源１０から前記非常用
交流電源１１への電源の切り換えを行うことができるの
である。つまり、従来のように前記非常用交流電源１１
が定常状態にまで安定化するのを待って前記常用交流電
源１０から切り換えるためのスイッチを設けたり、前記
非常用交流電源１１の電圧値の制御を行う必要がないの
である。従って、前記非常用交流電源１１の立ち上がり
時において、このようなスイッチによる電源の切り換え
を回避できるため、急激な負荷条件の変化を防止でき、
前記非常用交流電源１１である自家発電機のノッキング
を効果的に防止できるのである。At time t 3 , the charging voltage value V C is
Drops to the charge voltage V 2, the second diode 5 is turned on, electric power is supplied to the load side via the inverter 7 from the second charger 6, until said commercial AC power source 10 is restored (t = t 4 ), the state continues. Thus, the second charging voltage V 2 lower than said first charging voltages V 1, given appropriate between the threshold voltage V T of the first charging voltages V 1 and the second charging voltage V 2 The power supply can be switched from the normal AC power supply 10 to the emergency AC power supply 11 without interruption by simply setting the value. In other words, the emergency AC power supply 11
There is no need to provide a switch for switching from the commercial AC power supply 10 after the power supply is stabilized to a steady state, or to control the voltage value of the emergency AC power supply 11. Therefore, when the emergency AC power supply 11 rises, switching of the power supply by such a switch can be avoided, so that a sudden change in the load condition can be prevented,
Knocking of the private generator, which is the emergency AC power supply 11, can be effectively prevented.
【００２７】時刻ｔ4 で停電した前記常用交流電源１０
が復帰すると、前記第１充電器４が作動状態になり、前
記第１充電器４の出力に前記第１充電電圧Ｖ1 に前記第
１ダイオード３の電圧降下分を加えた出力電圧が現れ
る。この時、前記充電電圧値Ｖ C は前記第２充電電圧Ｖ
2 まで低下しているため、前記第１ダイオード３はオン
し、前記蓄電池２の充電を開始し前記充電電圧値ＶC が
上昇し始めるとともに、前記インバータ７を介して負荷
側への電力供給を開始する。前記第１充電器４の出力は
前記常用交流電源１０の立ち上がりに伴い、徐々に電圧
が上昇するため前記第１ダイオード３がオンした後の電
流も徐々に増加することになり急激な負荷変動が生じ
ず、前記常用交流電源１０が商用電源以外の自家発電機
等であっても、その復帰時の立ち上がりにおいてノッキ
ングが発生するのを効果的に防止できるのである。Time tFour The ordinary AC power supply 10 that has failed
Is restored, the first charger 4 is activated, and
The first charging voltage V is applied to the output of the first charger 4.1 The second
An output voltage that is obtained by adding the voltage drop of one diode 3 appears
You. At this time, the charging voltage value V C Is the second charging voltage V
Two The first diode 3 is on.
Then, charging of the storage battery 2 is started and the charging voltage value VC But
As it begins to rise, the load
Power supply to the side. The output of the first charger 4 is
The voltage gradually increases with the rise of the commercial AC power supply 10.
Rises after the first diode 3 is turned on.
The flow will also gradually increase, causing sudden load fluctuations
The commercial AC power supply 10 is a private generator other than a commercial power supply.
Etc.
This can effectively prevent the occurrence of aging.
【００２８】時刻ｔ5 で前記充電電圧値ＶC が前記閾値
電圧ＶT まで上昇すると、前記非常用交流電源制御部８
がそれを検知して、前記非常用交流電源１１の作動を停
止する。従って、時刻ｔ4 から時刻ｔ5 までの間は、前
記非常用交流電源１１がまだ定常状態で作動中であるた
め、もし前記常用交流電源１０が再び停電しても、前記
非常用交流電源１１から前記負荷側へ安定して電力供給
できるのである。また、時刻ｔ5 以降に前記常用交流電
源１０が再び停電したとしても、上述した時刻ｔ2 以降
の動作手順を繰り返すことができるので、前記負荷側へ
の安定電力供給を維持できるのである。かかる前記常用
交流電源１０の再停電がなければ、図２に示すように、
前記蓄電池２の充電が進み、時刻ｔ6 において、前記充
電電圧値ＶC が前記第１充電電圧Ｖ1 まで上昇し通常状
態に復帰する。At time t 5 , when the charging voltage value V C rises to the threshold voltage V T , the emergency AC power controller 8
Detects this, and stops the operation of the emergency AC power supply 11. Thus, while from time t 4 to time t 5, since the the emergency AC power supply 11 is still operating in the steady state, even when power failure if said is commercial AC power source 10 again, the emergency AC power supply 11 , Power can be supplied stably to the load side. Further, even if the commercial AC power source 10 to the after time t 5 loses power again, since it is possible to repeat the procedure of an operation time t 2 and subsequent steps, it can maintain a stable power supply to the load side. If there is no such a power failure of the commercial AC power supply 10, as shown in FIG.
The charging of the battery 2 proceeds, at time t 6, the charging voltage V C returns raised to the normal state until the first charging voltage V 1.
【００２９】次に、本発明に係る無停電電源装置の第二
の実施形態（以下、本発明装置９という。）について説
明する。図３に示すように、本発明装置９の構成は、前
記本発明装置１に対して、前記非常用交流電源制御部８
を具備していない点以外は全く同じである。よって、共
通の構成要素には同じ符合を付して表示してある。Next, a second embodiment of the uninterruptible power supply according to the present invention (hereinafter referred to as the present invention 9) will be described. As shown in FIG. 3, the configuration of the device 9 of the present invention is different from the device 1 of the present invention in that the emergency AC power controller 8
Are exactly the same except that they are not provided. Therefore, common components are denoted by the same reference numerals.
【００３０】尚、本発明装置９では、前記本発明装置１
と異なり、前記常用交流電源１０として、ディーゼルエ
ンジンやガスタービン等の原動機による自家発電機の使
用を想定しており、前記非常用交流電源１１として商用
電源の使用を想定している。図中破線部分が本発明装置
９であるが、前記非常用交流電源１１を本発明装置９に
含む構成としても構わない。In the device 9 of the present invention, the device 1 of the present invention is used.
Differently from this, it is assumed that a private generator using a prime mover such as a diesel engine or a gas turbine is used as the commercial AC power supply 10, and a commercial power supply is used as the emergency AC power supply 11. The broken line in the figure is the device 9 of the present invention, but the emergency AC power supply 11 may be included in the device 9 of the present invention.
【００３１】次に、本発明装置９の動作について説明す
る。図４に示すように、前記常用交流電源１０が通電中
（ｔ＜ｔ11）は前記蓄電池２は前記第１充電器４から前
記第１ダイオード３を介して前記第１充電電圧Ｖ1まで
充電されている。負荷側への電力供給は、前記常用交流
電源１０から前記第１充電器４、前記第１ダイオード３
及び前記インバータ７を介して行われている。前記非常
用交流電源１１も通電中であるが、前記第２充電器６の
出力には前記第２充電電圧Ｖ2 に前記第２ダイオード５
の電圧降下分を加えた出力電圧が現れるものの、前記充
電電圧値ＶC が前記第１充電電圧Ｖ1 で前記第２充電電
圧Ｖ2より高いため前記第２ダイオードはオフしてお
り、前記非常用交流電源１１から負荷側への電力供給は
行われない。Next, the operation of the device 9 of the present invention will be described. As shown in FIG. 4, while the commercial AC power supply 10 is energized (t <t 11 ), the storage battery 2 is charged from the first charger 4 to the first charging voltage V 1 via the first diode 3. Have been. The power supply to the load side is performed by the first AC charger 10 and the first diode 3 from the commercial AC power supply 10.
And through the inverter 7. Wherein is a emergency AC power supply 11 during energization, the second diode 5 in the second charging voltage V 2 at the output of the second charger 6
Although the output voltage obtained by adding the voltage drop of the second voltage appears, the second diode is off because the charging voltage value V C is higher than the second charging voltage V 2 at the first charging voltage V 1 , and the emergency voltage is higher. No power is supplied from the AC power supply 11 to the load side.
【００３２】時刻ｔ11で前記常用交流電源１０が停電す
ると、前記第１充電器４からの電力供給が停止し、代わ
って前記蓄電池２から前記インバータ７を介して負荷側
に電力供給される。かかる電力供給とともに前記蓄電池
２の放電が進み、前記蓄電池２の前記充電電圧値ＶC は
時刻ｔ12において前記第２充電電圧Ｖ2 になるまで低下
する。ここで、前記第２充電器６の出力には上述の如く
前記第２充電電圧Ｖ2に前記第２ダイオード５の電圧降
下分を加えた出力電圧が現れるが、時刻ｔ11から時刻ｔ
12までの前記充電電圧値ＶC が前記第２充電電圧Ｖ2 よ
り高い間は前記第２ダイオード５はオフしており、前記
蓄電池２からのみの電力供給となる。When the commercial AC power supply 10 fails at time t 11 , the power supply from the first charger 4 is stopped, and instead the power is supplied from the storage battery 2 to the load side via the inverter 7. Discharging of the battery 2 proceeds with such power supply, the charging voltage value V C of the battery 2 is reduced to a second charging voltage V 2 at time t 12. Here, the second the output voltage plus the voltage drop of the second diode 5 in the second charging voltage V 2 as described above appears in the output of the charger 6, the time from time t 11 t
While the charge voltage value V C up to 12 is higher than the second charge voltage V 2, the second diode 5 is off, and power is supplied only from the storage battery 2.
【００３３】時刻ｔ12で前記充電電圧値ＶC が前記第２
充電電圧Ｖ2 まで低下すると、前記第２ダイオード５が
オンし、前記第２充電器６から前記インバータ７を介し
て負荷側に電力供給され、前記常用交流電源１０が復帰
するまで（ｔ＝ｔ13）、当該状態が継続する。The time t 12 the charging voltage V C at the second
Drops to the charge voltage V 2, the second diode 5 is turned on, electric power is supplied to the load side via the inverter 7 from the second charger 6, until said commercial AC power source 10 is restored (t = t 13 ), the state continues.
【００３４】時刻ｔ13で停電した前記常用交流電源１０
が復帰すると、前記第１充電器４が作動状態になり、前
記第１充電器４の出力に前記第１充電電圧Ｖ1 に前記第
１ダイオード３の電圧降下分を加えた出力電圧が現れ
る。この時、前記充電電圧値Ｖ C は前記第２充電電圧Ｖ
2 まで低下しているため、前記第１ダイオード３はオン
し、前記蓄電池２の充電を開始し前記充電電圧値ＶC が
上昇し始めるとともに、前記インバータ７を介して負荷
側への電力供給を開始する。前記第１充電器４の出力は
前記常用交流電源１０の立ち上がりに伴い、徐々に電圧
が上昇するため前記第１ダイオード３がオンした後の電
流も徐々に増加することになり急激な負荷変動が生じ
ず、前記常用交流電源１０のノッキングを効果的に防止
できるのである。途中で前記常用交流電源１０の再停電
がない限り、前記蓄電池２の充電が進み、時刻ｔ14にお
いて、前記充電電圧値ＶC が前記第１充電電圧Ｖ1 まで
上昇し通常状態に復帰する。また、仮に途中で前記常用
交流電源１０の再停電があったとしても、上述した時刻
ｔ11以降の動作手順を繰り返すことができるので、前記
負荷側への安定電力供給を維持できるのである。Time t13The ordinary AC power supply 10 that has failed
Is restored, the first charger 4 is activated, and
The first charging voltage V is applied to the output of the first charger 4.1 The second
An output voltage that is obtained by adding the voltage drop of one diode 3 appears
You. At this time, the charging voltage value V C Is the second charging voltage V
Two The first diode 3 is on.
Then, charging of the storage battery 2 is started and the charging voltage value VC But
As it begins to rise, the load
Power supply to the side. The output of the first charger 4 is
The voltage gradually increases with the rise of the commercial AC power supply 10.
Rises after the first diode 3 is turned on.
The flow will also gradually increase, causing sudden load fluctuations
Effectively prevent knocking of the commercial AC power supply 10
You can. Power interruption of the AC power supply 10 on the way
As long as there is no charging, the charging of the storage battery 2 proceeds and the time t14In
And the charging voltage value VC Is the first charging voltage V1 Until
Ascends and returns to normal state. Also, if the usual use
Even if there is a power outage of the AC power supply 10,
t11Since the subsequent operation procedure can be repeated,
The stable power supply to the load side can be maintained.
【００３５】以下、別の実施形態について説明する。 〈１〉前記第一または第二の実施形態において、前記負
荷が小さい場合や、前記常用交流電源１０及び前記非常
用交流電源１１の立ち上がり時間が短い場合は、前記蓄
電池２の代わりにコンデンサを使用しても構わない。Hereinafter, another embodiment will be described. <1> In the first or second embodiment, a capacitor is used instead of the storage battery 2 when the load is small or when the rise time of the service AC power supply 10 and the emergency AC power supply 11 is short. It does not matter.
【００３６】〈２〉前記第一の実施形態において、前記
非常用交流電源制御部８が、時刻ｔ5において前記充電
電圧値ＶC が前記閾値電圧ＶT まで上昇したのを検知し
て、前記非常用交流電源１１の作動を停止する代わり
に、時刻ｔ6 において、前記充電電圧値ＶC が前記第１
充電電圧Ｖ1 まで上昇し通常状態に復帰するのを待って
前記作動の停止を行っても構わない。このようにする
と、前記常用交流電源１０の立ち上がり時における、前
記常用交流電源１０或いは前記第１充電器４の不安定動
作または負荷変動等によって前記充電電圧値ＶC が前記
閾値電圧ＶT 付近で不安定に変動しても、前記非常用交
流電源１１が不安定にオンとオフを繰り返すという異常
事態を回避できるのである。[0036] <2> In the first embodiment, the the emergency AC power supply control unit 8 detects the at time t 5 of the charging voltage V C is increased to the threshold voltage V T, the instead of stopping the operation of the emergency AC power supply 11, at time t 6, the charging voltage V C is the first
It may be performed to stop the operation waiting to return to elevated normal state until the charging voltage V 1. In this way, at the time of the rise of the commercial AC power supply 10, the charging voltage value V C by unstable operation or load fluctuations of the commercial AC power supply 10 or the first charger 4 in the vicinity of the threshold voltage V T Even if it fluctuates unstablely, it is possible to avoid an abnormal situation in which the emergency AC power supply 11 repeatedly turns on and off unstablely.
【００３７】〈３〉前記第一の実施形態において、前記
常用交流電源１０は必ずしも商用電源でなくとも構わな
い。両交流電源１０、１１ともに自家発電機であっても
構わない。また、前記第一または第二の実施形態を発展
させた形態として、前記常用交流電源１０と前記第１充
電器４、または、前記非常用交流電源１１と前記第２充
電器６の何れか一方を、例えば太陽電池等の直流電源と
直流入力から直流定電圧を出力するＤＣ／ＤＣコンバー
タの組み合わせに置換するのも好ましい実施の形態であ
る。<3> In the first embodiment, the commercial AC power supply 10 does not necessarily have to be a commercial power supply. Both AC power supplies 10 and 11 may be private power generators. Further, as a form in which the first or second embodiment is developed, one of the commercial AC power supply 10 and the first charger 4 or the emergency AC power supply 11 and the second charger 6 is used. It is also a preferred embodiment to replace with a combination of a DC power supply such as a solar cell and a DC / DC converter that outputs a DC constant voltage from a DC input.
【００３８】[0038]
【発明の効果】以上説明したように、本発明によれば、
常用交流電源及び非常用交流電源の特性にかかわらず、
両電源間の切り換えに伴う複雑な調整が不要で、両電源
間のスムーズな切り換えが可能な無停電電源装置を提供
できるようになった。更に、前記常用交流電源及び前記
非常用交流電源は、両電源間で位相を同期させる必要が
無く、また、線数、相数、電圧、周波数等の出力形式を
夫々独立且つ任意に選択できるため、例えば、前記常用
交流電源として商用交流電源をした場合に、前記非常用
交流電源として種々の出力形式の発電機を利用できるよ
うになった。更に、前記常用交流電源または前記非常用
交流電源、或いはその両方を含めた無停電電源システム
全体の設計自由度が広がり、システム全体の小型化を図
ることができるようになった。As described above, according to the present invention,
Regardless of the characteristics of the commercial AC power supply and the emergency AC power supply,
It is possible to provide an uninterruptible power supply capable of smoothly switching between the two power supplies without requiring complicated adjustments for switching between the two power supplies. Further, since the common AC power supply and the emergency AC power supply do not need to synchronize the phases between the two power supplies, and the output types such as the number of lines, the number of phases, the voltage, and the frequency can be independently and arbitrarily selected. For example, when a commercial AC power supply is used as the normal AC power supply, various output types of generators can be used as the emergency AC power supply. Further, the degree of freedom in designing the entire uninterruptible power supply system including the commercial AC power supply and / or the emergency AC power supply, or both, is expanded, and the size of the entire system can be reduced.
【図１】本発明に係る無停電電源装置の第一の実施形態
を示すブロック構成図FIG. 1 is a block diagram showing a first embodiment of an uninterruptible power supply according to the present invention.
【図２】本発明に係る無停電電源装置の第一の実施形態
の充電電圧波形の模式図FIG. 2 is a schematic diagram of a charging voltage waveform of the first embodiment of the uninterruptible power supply according to the present invention.
【図３】本発明に係る無停電電源装置の第二の実施形態
を示すブロック構成図FIG. 3 is a block diagram showing a second embodiment of the uninterruptible power supply according to the present invention;
【図４】本発明に係る無停電電源装置の第二の実施形態
の充電電圧波形の模式図FIG. 4 is a schematic diagram of a charging voltage waveform of a second embodiment of the uninterruptible power supply according to the present invention.
【図５】従来の無停電電源装置の一例を示すブロック構
成図FIG. 5 is a block diagram showing an example of a conventional uninterruptible power supply.
【符号の説明】 １、９ 本発明装置 ２ 蓄電池（蓄電装置） ３ 第１ダイオード ４ 第１充電器 ５ 第２ダイオード ６ 第２充電器 ７ インバータ ８ 非常用交流電源制御部 １０ 常用交流電源 １１ 非常用交流電源[Description of Signs] 1, 9 Device of the present invention 2 Storage battery (power storage device) 3 First diode 4 First charger 5 Second diode 6 Second charger 7 Inverter 8 Emergency AC power supply control unit 10 Regular AC power supply 11 Emergency AC power supply
Claims (4)
力を直流出力に変換して前記蓄電装置を所定の第１充電
電圧に第１ダイオードを介して充電可能な第１充電器
と、非常用交流電源からの交流入力を直流出力に変換し
て前記蓄電装置を前記第１充電電圧より低い所定の第２
充電電圧に第２ダイオードを介して充電可能な第２充電
器と、前記蓄電装置からの直流入力を交流出力に変換す
るインバータと、前記蓄電装置の充電電圧値が所定の閾
値以下に低下した場合に前記非常用交流電源の作動を開
始する非常用交流電源制御部とを備えてなる無停電電源
装置。An electric storage device, a first charger that converts an AC input from a commercial AC power supply to a DC output and charges the electric storage device to a predetermined first charging voltage via a first diode, Converting the AC input from the AC power supply into a DC output to switch the power storage device to a predetermined second voltage lower than the first charging voltage.
A second charger that can charge a charging voltage via a second diode, an inverter that converts a DC input from the power storage device to an AC output, and a case where a charging voltage value of the power storage device falls below a predetermined threshold value An uninterruptible power supply device further comprising: an emergency AC power control unit for starting operation of the emergency AC power supply.
上に復帰した場合に、前記非常用交流電源制御部が前記
非常用交流電源の作動を停止することを特徴とする請求
項１記載の無停電電源装置。2. The emergency AC power supply controller according to claim 1, wherein the emergency AC power supply controller stops operating the emergency AC power supply when the charging voltage value of the power storage device returns to the threshold value or more. Uninterruptible power system.
電電圧に復帰した場合に、前記非常用交流電源制御部が
前記非常用交流電源の作動を停止することを特徴とする
請求項１記載の無停電電源装置。3. The emergency AC power supply control section stops the operation of the emergency AC power supply when the charging voltage value of the power storage device returns to the first charging voltage. The uninterruptible power supply as described.
力を直流出力に変換して前記蓄電装置を所定の第１充電
電圧に第１ダイオードを介して充電可能な第１充電器
と、非常用交流電源からの交流入力を直流出力に変換し
て前記蓄電装置を前記第１充電電圧より低い所定の第２
充電電圧に第２ダイオードを介して充電可能な第２充電
器と、前記蓄電装置からの直流入力を交流出力に変換す
るインバータとを備えてなり、前記非常用交流電源が商
用電源であり、前記第２充電器が常時給電状態にあるこ
とを特徴とする無停電電源装置。4. A power storage device, a first charger that converts an AC input from a commercial AC power supply into a DC output and charges the power storage device to a predetermined first charging voltage via a first diode, Converting the AC input from the AC power supply into a DC output to switch the power storage device to a predetermined second voltage lower than the first charging voltage.
A second charger capable of charging a charging voltage via a second diode, and an inverter for converting a DC input from the power storage device to an AC output, wherein the emergency AC power supply is a commercial power supply, An uninterruptible power supply device, wherein the second charger is always in a power supply state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06512898A JP3608935B2 (en) | 1998-03-16 | 1998-03-16 | Uninterruptible power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06512898A JP3608935B2 (en) | 1998-03-16 | 1998-03-16 | Uninterruptible power system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11266550A true JPH11266550A (en) | 1999-09-28 |
| JP3608935B2 JP3608935B2 (en) | 2005-01-12 |
Family
ID=13277938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06512898A Expired - Fee Related JP3608935B2 (en) | 1998-03-16 | 1998-03-16 | Uninterruptible power system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3608935B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010239785A (en) * | 2009-03-31 | 2010-10-21 | Ihi Infrastructure Systems Co Ltd | Load driving device |
| JP2010259218A (en) * | 2009-04-24 | 2010-11-11 | Ihi Infrastructure Systems Co Ltd | Load drive unit |
| CN105262351A (en) * | 2015-08-27 | 2016-01-20 | 许继集团有限公司 | Multi-level driving circuit |
| CN108808831A (en) * | 2017-12-15 | 2018-11-13 | 苏州沸迩灵精密制造有限公司 | A kind of circuit of continuous charged renewal battery |
| CN110741529A (en) * | 2017-06-12 | 2020-01-31 | 松下知识产权经营株式会社 | Vehicle-mounted power supply device |
-
1998
- 1998-03-16 JP JP06512898A patent/JP3608935B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010239785A (en) * | 2009-03-31 | 2010-10-21 | Ihi Infrastructure Systems Co Ltd | Load driving device |
| JP2010259218A (en) * | 2009-04-24 | 2010-11-11 | Ihi Infrastructure Systems Co Ltd | Load drive unit |
| CN105262351A (en) * | 2015-08-27 | 2016-01-20 | 许继集团有限公司 | Multi-level driving circuit |
| CN105262351B (en) * | 2015-08-27 | 2019-07-19 | 许继集团有限公司 | A kind of more level driving circuits |
| CN110741529A (en) * | 2017-06-12 | 2020-01-31 | 松下知识产权经营株式会社 | Vehicle-mounted power supply device |
| CN110741529B (en) * | 2017-06-12 | 2023-02-17 | 松下知识产权经营株式会社 | Vehicle-mounted power supply device |
| CN108808831A (en) * | 2017-12-15 | 2018-11-13 | 苏州沸迩灵精密制造有限公司 | A kind of circuit of continuous charged renewal battery |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3608935B2 (en) | 2005-01-12 |
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